Josh Tomlin has the most home runs allowed per inning pitched with 70.0+ innings pitched in a season, with 0.36 in 2018.

Interpreted as:

most hr/ip by a player in a season, minimum 70 ip

	NAME	HR/IP	IP	HR	SEASON	TM	G	W	L	W%	GS	ERA	SO	CG	SHO	SV	H	ER	R	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Josh Tomlin J. Tomlin	0.36	70.1	25	2018	CLE	32	2	5	.286	9	6.14	46	0	0	0	92	48	52	12	4	19	1	321	5	5.89	1.54	3.83	3.20	14.3	3.7	1.48	.286	6.65	140	7.15	169	11.77	-22.8
2	David Hess D. Hess	0.35	80.0	28	2019	BAL	23	1	10	.091	14	7.09	68	0	0	0	94	63	73	30	2	5	0	365	1	7.65	3.38	2.27	3.15	18.6	8.2	1.55	.278	8.21	151	7.25	150	10.58	-20.1
3	Amir Garrett A. Garrett	0.33	70.2	23	2017	CIN	16	3	8	.273	14	7.39	63	0	0	0	74	58	60	40	2	0	2	321	1	8.02	5.09	1.58	2.93	19.6	12.5	1.61	.264	7.64	167	7.38	168	9.42	-22.9
4	Bronson Arroyo B. Arroyo	0.32	71.0	23	2017	CIN	14	3	6	.333	14	7.35	45	0	0	0	94	58	59	19	2	0	2	322	1	5.70	2.41	2.37	2.92	14.0	5.9	1.59	.305	7.48	166	6.98	159	11.92	-19.9
5	Chris Young C. Young	0.32	88.2	28	2016	KCR	34	3	9	.250	13	6.19	94	0	0	1	104	61	63	43	1	7	1	406	3	9.54	4.36	2.19	2.84	23.2	10.6	1.66	.317	6.39	146	6.61	159	10.56	-24.8
6	Roddery Muñoz R. Muñoz	0.31	82.2	26	2024	MIA	18	2	7	.222	17	6.53	70	0	0	0	89	60	66	42	5	0	0	379	4	7.62	4.57	1.67	2.83	18.5	11.1	1.58	.267	7.19	155	7.26	179	9.69	-29.4
7	Jeff Hoffman J. Hoffman	0.3	70.0	21	2019	COL	15	2	6	.250	15	6.56	68	0	0	0	77	51	51	34	4	0	3	315	2	8.74	4.37	2.00	2.70	21.6	10.8	1.59	.298	6.56	132	6.79	146	9.90	-15.7
8	Ken Dixon K. Dixon	0.3	105.0	31	1987	BAL	34	7	10	.412	15	6.43	91	0	0	5	128	75	81	27	1	13	4	470	5	7.80	2.31	3.37	2.66	19.4	5.7	1.48	.303	6.94	146	5.76	128	10.97	-14.5
9	Jaime Barría J. Barría	0.29	82.2	24	2019	LAA	19	4	10	.286	13	6.42	75	0	0	0	92	59	61	27	2	1	0	365	1	8.17	2.94	2.78	2.61	20.5	7.4	1.44	.287	6.64	138	6.21	133	10.02	-14
10	Taijuan Walker T. Walker	0.29	83.2	24	2024	PHI	19	3	7	.300	15	7.10	58	0	0	0	107	66	68	37	3	1	0	381	0	6.24	3.98	1.57	2.58	15.2	9.7	1.72	.320	7.31	172	6.94	168	11.51	-25.4
11	Dylan Covey D. Covey	0.29	70.0	20	2017	CWS	18	0	7	.000	12	7.71	41	0	0	0	83	60	60	34	1	4	1	309	6	5.27	4.37	1.21	2.57	13.3	11.0	1.67	.296	7.71	180	7.19	162	10.67	-21.3
12	Bruce Zimmermann B. Zimmermann	0.29	73.2	21	2022	BAL	15	2	5	.286	13	5.99	49	0	0	0	97	49	52	12	2	1	0	320	1	5.99	1.47	4.08	2.57	15.3	3.8	1.48	.322	6.35	158	6.05	157	11.85	-18.4
13	Doug Waechter D. Waechter	0.28	70.1	20	2004	TBD	14	5	7	.417	14	6.01	36	0	0	0	68	47	54	33	4	0	1	309	1	4.61	4.22	1.09	2.56	11.7	10.7	1.44	.222	6.91	131	7.29	161	8.70	-21.7
14	José Suarez J. Suarez	0.28	81.0	23	2019	LAA	19	2	6	.250	15	7.11	72	0	0	0	100	64	67	33	10	0	1	375	5	8.00	3.67	2.18	2.56	19.2	8.8	1.64	.325	7.44	153	6.71	144	11.11	-18
15	Ezequiel Astacio E. Astacio	0.28	81.0	23	2005	HOU	22	3	6	.333	14	5.67	66	0	0	0	100	51	56	25	1	5	2	366	4	7.33	2.78	2.64	2.56	18.0	6.8	1.54	.307	6.22	134	6.03	141	11.11	-15.5
16	Bruce Chen B. Chen	0.28	98.2	28	2006	BAL	40	0	7	.000	12	6.93	70	0	0	0	137	76	81	35	0	16	3	453	1	6.39	3.19	2.00	2.55	15.5	7.7	1.74	.341	7.39	151	6.47	139	12.50	-19.3
17	Drew Smyly D. Smyly	0.28	114.0	32	2019	TOT	25	4	7	.364	21	6.24	120	0	0	1	126	79	83	55	2	1	0	514	7	9.47	4.34	2.18	2.53	23.3	10.7	1.59	.308	6.55	131	6.25	134	9.95	-19.4
18	Griffin Jax G. Jax	0.28	82.0	23	2021	MIN	18	4	5	.444	14	6.37	65	0	0	0	82	58	62	29	5	2	1	360	6	7.13	3.18	2.24	2.52	18.1	8.1	1.35	.248	6.80	149	6.47	153	9.00	-20.6
19	Andy Benes A. Benes	0.28	107.1	30	2001	STL	27	7	7	.500	19	7.38	78	0	0	0	122	88	92	61	6	3	0	500	1	6.54	5.11	1.28	2.52	15.6	12.2	1.70	.283	7.71	173	7.10	161	10.23	-32.2
20	Scott Klingenbeck S. Klingenbeck	0.28	79.2	22	1995	TOT	24	2	4	.333	9	7.12	42	0	0	0	101	63	65	42	4	4	0	373	7	4.74	4.74	1.00	2.49	11.3	11.3	1.79	.300	7.34	148	7.37	157	11.41	-23.6
21	Adam Plutko A. Plutko	0.27	76.2	21	2018	CLE	17	4	5	.444	12	5.28	60	0	0	1	78	45	45	23	1	4	1	326	3	7.04	2.70	2.61	2.47	18.4	7.1	1.32	.258	5.28	120	6.09	144	9.16	-15.9
22	Taylor Clarke T. Clarke	0.27	84.2	23	2019	ARI	23	5	5	.500	15	5.31	68	0	0	1	86	50	55	30	6	3	0	369	3	7.23	3.19	2.27	2.44	18.4	8.1	1.37	.260	5.85	120	6.40	148	9.14	-19.9
23	Josiah Gray J. Gray	0.27	70.2	19	2021	TOT	14	2	2	.500	13	5.48	76	0	0	0	63	43	44	33	2	0	3	307	7	9.68	4.20	2.30	2.42	24.8	10.7	1.36	.249	5.60	131	5.99	140	8.02	-13.3
24	Greg Gohr G. Gohr	0.27	115.2	31	1996	TOT	32	5	9	.357	16	7.24	75	0	0	1	163	93	96	44	3	7	2	546	6	5.84	3.42	1.70	2.41	13.7	8.1	1.79	.336	7.47	144	6.57	130	12.68	-19
25	David Hernandez D. Hernandez	0.27	101.1	27	2009	BAL	20	4	10	.286	19	5.42	68	0	0	0	118	61	62	46	1	0	0	462	3	6.04	4.09	1.48	2.40	14.7	10.0	1.62	.284	5.51	119	6.60	144	10.48	-21.7